git.delta.rocks / unique-network / refs/commits / 2f9c8d434e2f

1// Copyright 2019-2022 Unique Network (Gibraltar) Ltd.2// This file is part of Unique Network.34// Unique Network is free software: you can redistribute it and/or modify5// it under the terms of the GNU General Public License as published by6// the Free Software Foundation, either version 3 of the License, or7// (at your option) any later version.89// Unique Network is distributed in the hope that it will be useful,10// but WITHOUT ANY WARRANTY; without even the implied warranty of11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the12// GNU General Public License for more details.1314// You should have received a copy of the GNU General Public License15// along with Unique Network. If not, see <http://www.gnu.org/licenses/>.1617#![cfg_attr(not(feature = "std"), no_std)]1819use core::ops::{Deref, DerefMut};20use pallet_evm_coder_substrate::{SubstrateRecorder, WithRecorder};21use sp_std::vec::Vec;22use pallet_evm::account::CrossAccountId;23use frame_support::{24	dispatch::{DispatchErrorWithPostInfo, DispatchResultWithPostInfo},25	ensure, fail,26	traits::{Imbalance, Get, Currency},27	BoundedVec,28};29use pallet_evm::GasWeightMapping;30use up_data_structs::{31	COLLECTION_NUMBER_LIMIT, Collection, CollectionId, CreateItemData, ExistenceRequirement,32	MAX_TOKEN_PREFIX_LENGTH, COLLECTION_ADMINS_LIMIT, MetaUpdatePermission, Pays, PostDispatchInfo,33	TokenId, Weight, WithdrawReasons, CollectionStats, MAX_TOKEN_OWNERSHIP, CollectionMode,34	NFT_SPONSOR_TRANSFER_TIMEOUT, FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,35	REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT, MAX_SPONSOR_TIMEOUT, CUSTOM_DATA_LIMIT, CollectionLimits,36	CustomDataLimit, CreateCollectionData, SponsorshipState, CreateItemExData, SponsoringRateLimit,37};38pub use pallet::*;39use sp_core::H160;40use sp_runtime::{ArithmeticError, DispatchError, DispatchResult};41#[cfg(feature = "runtime-benchmarks")]42pub mod benchmarking;43pub mod erc;44pub mod eth;4546#[must_use = "Should call submit_logs or save, otherwise some data will be lost for evm side"]47pub struct CollectionHandle<T: Config> {48	pub id: CollectionId,49	collection: Collection<T::AccountId>,50	pub recorder: SubstrateRecorder<T>,51}52impl<T: Config> WithRecorder<T> for CollectionHandle<T> {53	fn recorder(&self) -> &SubstrateRecorder<T> {54		&self.recorder55	}56	fn into_recorder(self) -> SubstrateRecorder<T> {57		self.recorder58	}59}60impl<T: Config> CollectionHandle<T> {61	pub fn new_with_gas_limit(id: CollectionId, gas_limit: u64) -> Option<Self> {62		<CollectionById<T>>::get(id).map(|collection| Self {63			id,64			collection,65			recorder: SubstrateRecorder::new(eth::collection_id_to_address(id), gas_limit),66		})67	}68	pub fn new(id: CollectionId) -> Option<Self> {69		Self::new_with_gas_limit(id, u64::MAX)70	}71	pub fn try_get(id: CollectionId) -> Result<Self, DispatchError> {72		Ok(Self::new(id).ok_or(<Error<T>>::CollectionNotFound)?)73	}74	pub fn log_mirrored(&self, log: impl evm_coder::ToLog) {75		self.recorder.log_mirrored(log)76	}77	pub fn log_direct(&self, log: impl evm_coder::ToLog) {78		self.recorder.log_direct(log)79	}80	pub fn consume_store_reads(&self, reads: u64) -> evm_coder::execution::Result<()> {81		self.recorder82			.consume_gas(T::GasWeightMapping::weight_to_gas(83				<T as frame_system::Config>::DbWeight::get()84					.read85					.saturating_mul(reads),86			))87	}88	pub fn consume_store_writes(&self, writes: u64) -> evm_coder::execution::Result<()> {89		self.recorder90			.consume_gas(T::GasWeightMapping::weight_to_gas(91				<T as frame_system::Config>::DbWeight::get()92					.write93					.saturating_mul(writes),94			))95	}96	pub fn submit_logs(self) {97		self.recorder.submit_logs()98	}99	pub fn save(self) -> DispatchResult {100		self.recorder.submit_logs();101		<CollectionById<T>>::insert(self.id, self.collection);102		Ok(())103	}104}105impl<T: Config> Deref for CollectionHandle<T> {106	type Target = Collection<T::AccountId>;107108	fn deref(&self) -> &Self::Target {109		&self.collection110	}111}112113impl<T: Config> DerefMut for CollectionHandle<T> {114	fn deref_mut(&mut self) -> &mut Self::Target {115		&mut self.collection116	}117}118119impl<T: Config> CollectionHandle<T> {120	pub fn check_is_owner(&self, subject: &T::CrossAccountId) -> DispatchResult {121		ensure!(*subject.as_sub() == self.owner, <Error<T>>::NoPermission);122		Ok(())123	}124	pub fn is_owner_or_admin(&self, subject: &T::CrossAccountId) -> bool {125		*subject.as_sub() == self.owner || <IsAdmin<T>>::get((self.id, subject))126	}127	pub fn check_is_owner_or_admin(&self, subject: &T::CrossAccountId) -> DispatchResult {128		ensure!(self.is_owner_or_admin(subject), <Error<T>>::NoPermission);129		Ok(())130	}131	pub fn ignores_allowance(&self, user: &T::CrossAccountId) -> bool {132		self.limits.owner_can_transfer() && self.is_owner_or_admin(user)133	}134	pub fn ignores_owned_amount(&self, user: &T::CrossAccountId) -> bool {135		self.limits.owner_can_transfer() && self.is_owner_or_admin(user)136	}137	pub fn check_allowlist(&self, user: &T::CrossAccountId) -> DispatchResult {138		ensure!(139			<Allowlist<T>>::get((self.id, user)),140			<Error<T>>::AddressNotInAllowlist141		);142		Ok(())143	}144145	pub fn check_can_update_meta(146		&self,147		subject: &T::CrossAccountId,148		item_owner: &T::CrossAccountId,149	) -> DispatchResult {150		match self.meta_update_permission {151			MetaUpdatePermission::ItemOwner => {152				ensure!(subject == item_owner, <Error<T>>::NoPermission);153				Ok(())154			}155			MetaUpdatePermission::Admin => self.check_is_owner_or_admin(subject),156			MetaUpdatePermission::None => fail!(<Error<T>>::NoPermission),157		}158	}159}160161#[frame_support::pallet]162pub mod pallet {163	use super::*;164	use frame_support::{Blake2_128Concat, pallet_prelude::*, storage::Key};165	use pallet_evm::account;166	use frame_support::traits::Currency;167	use up_data_structs::TokenId;168	use scale_info::TypeInfo;169170	#[pallet::config]171	pub trait Config:172		frame_system::Config + pallet_evm_coder_substrate::Config + TypeInfo + account::Config173	{174		type Event: IsType<<Self as frame_system::Config>::Event> + From<Event<Self>>;175176		type Currency: Currency<Self::AccountId>;177178		#[pallet::constant]179		type CollectionCreationPrice: Get<180			<<Self as Config>::Currency as Currency<Self::AccountId>>::Balance,181		>;182183		type TreasuryAccountId: Get<Self::AccountId>;184	}185186	#[pallet::pallet]187	#[pallet::generate_store(pub(super) trait Store)]188	pub struct Pallet<T>(_);189190	#[pallet::extra_constants]191	impl<T: Config> Pallet<T> {192		pub fn collection_admins_limit() -> u32 {193			COLLECTION_ADMINS_LIMIT194		}195	}196197	#[pallet::event]198	#[pallet::generate_deposit(pub fn deposit_event)]199	pub enum Event<T: Config> {200		/// New collection was created201		///202		/// # Arguments203		///204		/// * collection_id: Globally unique identifier of newly created collection.205		///206		/// * mode: [CollectionMode] converted into u8.207		///208		/// * account_id: Collection owner.209		CollectionCreated(CollectionId, u8, T::AccountId),210211		/// New collection was destroyed212		///213		/// # Arguments214		///215		/// * collection_id: Globally unique identifier of collection.216		CollectionDestroyed(CollectionId),217218		/// New item was created.219		///220		/// # Arguments221		///222		/// * collection_id: Id of the collection where item was created.223		///224		/// * item_id: Id of an item. Unique within the collection.225		///226		/// * recipient: Owner of newly created item227		///228		/// * amount: Always 1 for NFT229		ItemCreated(CollectionId, TokenId, T::CrossAccountId, u128),230231		/// Collection item was burned.232		///233		/// # Arguments234		///235		/// * collection_id.236		///237		/// * item_id: Identifier of burned NFT.238		///239		/// * owner: which user has destroyed its tokens240		///241		/// * amount: Always 1 for NFT242		ItemDestroyed(CollectionId, TokenId, T::CrossAccountId, u128),243244		/// Item was transferred245		///246		/// * collection_id: Id of collection to which item is belong247		///248		/// * item_id: Id of an item249		///250		/// * sender: Original owner of item251		///252		/// * recipient: New owner of item253		///254		/// * amount: Always 1 for NFT255		Transfer(256			CollectionId,257			TokenId,258			T::CrossAccountId,259			T::CrossAccountId,260			u128,261		),262263		/// * collection_id264		///265		/// * item_id266		///267		/// * sender268		///269		/// * spender270		///271		/// * amount272		Approved(273			CollectionId,274			TokenId,275			T::CrossAccountId,276			T::CrossAccountId,277			u128,278		),279	}280281	#[pallet::error]282	pub enum Error<T> {283		/// This collection does not exist.284		CollectionNotFound,285		/// Sender parameter and item owner must be equal.286		MustBeTokenOwner,287		/// No permission to perform action288		NoPermission,289		/// Collection is not in mint mode.290		PublicMintingNotAllowed,291		/// Address is not in allow list.292		AddressNotInAllowlist,293294		/// Collection name can not be longer than 63 char.295		CollectionNameLimitExceeded,296		/// Collection description can not be longer than 255 char.297		CollectionDescriptionLimitExceeded,298		/// Token prefix can not be longer than 15 char.299		CollectionTokenPrefixLimitExceeded,300		/// Total collections bound exceeded.301		TotalCollectionsLimitExceeded,302		/// variable_data exceeded data limit.303		TokenVariableDataLimitExceeded,304		/// Exceeded max admin count305		CollectionAdminCountExceeded,306		/// Collection limit bounds per collection exceeded307		CollectionLimitBoundsExceeded,308		/// Tried to enable permissions which are only permitted to be disabled309		OwnerPermissionsCantBeReverted,310311		/// Collection settings not allowing items transferring312		TransferNotAllowed,313		/// Account token limit exceeded per collection314		AccountTokenLimitExceeded,315		/// Collection token limit exceeded316		CollectionTokenLimitExceeded,317		/// Metadata flag frozen318		MetadataFlagFrozen,319320		/// Item not exists.321		TokenNotFound,322		/// Item balance not enough.323		TokenValueTooLow,324		/// Requested value more than approved.325		ApprovedValueTooLow,326		/// Tried to approve more than owned327		CantApproveMoreThanOwned,328329		/// Can't transfer tokens to ethereum zero address330		AddressIsZero,331		/// Target collection doesn't supports this operation332		UnsupportedOperation,333334		/// Not sufficient founds to perform action335		NotSufficientFounds,336	}337338	#[pallet::storage]339	pub type CreatedCollectionCount<T> = StorageValue<Value = CollectionId, QueryKind = ValueQuery>;340	#[pallet::storage]341	pub type DestroyedCollectionCount<T> =342		StorageValue<Value = CollectionId, QueryKind = ValueQuery>;343344	/// Collection info345	#[pallet::storage]346	pub type CollectionById<T> = StorageMap<347		Hasher = Blake2_128Concat,348		Key = CollectionId,349		Value = Collection<<T as frame_system::Config>::AccountId>,350		QueryKind = OptionQuery,351	>;352353	#[pallet::storage]354	pub type AdminAmount<T> = StorageMap<355		Hasher = Blake2_128Concat,356		Key = CollectionId,357		Value = u32,358		QueryKind = ValueQuery,359	>;360361	/// List of collection admins362	#[pallet::storage]363	pub type IsAdmin<T: Config> = StorageNMap<364		Key = (365			Key<Blake2_128Concat, CollectionId>,366			Key<Blake2_128Concat, T::CrossAccountId>,367		),368		Value = bool,369		QueryKind = ValueQuery,370	>;371372	/// Allowlisted collection users373	#[pallet::storage]374	pub type Allowlist<T: Config> = StorageNMap<375		Key = (376			Key<Blake2_128Concat, CollectionId>,377			Key<Blake2_128Concat, T::CrossAccountId>,378		),379		Value = bool,380		QueryKind = ValueQuery,381	>;382383	/// Not used by code, exists only to provide some types to metadata384	#[pallet::storage]385	pub type DummyStorageValue<T> =386		StorageValue<Value = (CollectionStats, CollectionId, TokenId), QueryKind = OptionQuery>;387}388389impl<T: Config> Pallet<T> {390	/// Ethereum receiver 0x0000000000000000000000000000000000000000 is reserved, and shouldn't own tokens391	pub fn ensure_correct_receiver(receiver: &T::CrossAccountId) -> DispatchResult {392		ensure!(393			&T::CrossAccountId::from_eth(H160([0; 20])) != receiver,394			<Error<T>>::AddressIsZero395		);396		Ok(())397	}398	pub fn adminlist(collection: CollectionId) -> Vec<T::CrossAccountId> {399		<IsAdmin<T>>::iter_prefix((collection,))400			.map(|(a, _)| a)401			.collect()402	}403	pub fn allowlist(collection: CollectionId) -> Vec<T::CrossAccountId> {404		<Allowlist<T>>::iter_prefix((collection,))405			.map(|(a, _)| a)406			.collect()407	}408	pub fn allowed(collection: CollectionId, user: T::CrossAccountId) -> bool {409		<Allowlist<T>>::get((collection, user))410	}411	pub fn collection_stats() -> CollectionStats {412		let created = <CreatedCollectionCount<T>>::get();413		let destroyed = <DestroyedCollectionCount<T>>::get();414		CollectionStats {415			created: created.0,416			destroyed: destroyed.0,417			alive: created.0 - destroyed.0,418		}419	}420421	pub fn effective_collection_limits(collection: CollectionId) -> Option<CollectionLimits> {422		let collection = <CollectionById<T>>::get(collection);423		if collection.is_none() {424			return None;425		}426427		let collection = collection.unwrap();428		let limits = collection.limits;429		let effective_limits = CollectionLimits {430			account_token_ownership_limit: Some(limits.account_token_ownership_limit()),431			sponsored_data_size: Some(limits.sponsored_data_size()),432			sponsored_data_rate_limit: Some(433				limits434					.sponsored_data_rate_limit435					.unwrap_or(SponsoringRateLimit::SponsoringDisabled),436			),437			token_limit: Some(limits.token_limit()),438			sponsor_transfer_timeout: Some(limits.sponsor_transfer_timeout(439				match collection.mode {440					CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,441					CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,442					CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,443				},444			)),445			sponsor_approve_timeout: Some(limits.sponsor_approve_timeout()),446			owner_can_transfer: Some(limits.owner_can_transfer()),447			owner_can_destroy: Some(limits.owner_can_destroy()),448			transfers_enabled: Some(limits.transfers_enabled()),449		};450451		Some(effective_limits)452	}453}454455impl<T: Config> Pallet<T> {456	pub fn init_collection(457		owner: T::AccountId,458		data: CreateCollectionData<T::AccountId>,459	) -> Result<CollectionId, DispatchError> {460		{461			ensure!(462				data.token_prefix.len() <= MAX_TOKEN_PREFIX_LENGTH as usize,463				Error::<T>::CollectionTokenPrefixLimitExceeded464			);465		}466467		let created_count = <CreatedCollectionCount<T>>::get()468			.0469			.checked_add(1)470			.ok_or(ArithmeticError::Overflow)?;471		let destroyed_count = <DestroyedCollectionCount<T>>::get().0;472		let id = CollectionId(created_count);473474		// bound Total number of collections475		ensure!(476			created_count - destroyed_count <= COLLECTION_NUMBER_LIMIT,477			<Error<T>>::TotalCollectionsLimitExceeded478		);479480		// =========481482		let collection = Collection {483			owner: owner.clone(),484			name: data.name,485			mode: data.mode.clone(),486			mint_mode: false,487			access: data.access.unwrap_or_default(),488			description: data.description,489			token_prefix: data.token_prefix,490			offchain_schema: data.offchain_schema,491			schema_version: data.schema_version.unwrap_or_default(),492			sponsorship: data493				.pending_sponsor494				.map(SponsorshipState::Unconfirmed)495				.unwrap_or_default(),496			variable_on_chain_schema: data.variable_on_chain_schema,497			const_on_chain_schema: data.const_on_chain_schema,498			limits: data499				.limits500				.map(|limits| Self::clamp_limits(data.mode.clone(), &Default::default(), limits))501				.unwrap_or_else(|| Ok(CollectionLimits::default()))?,502			meta_update_permission: data.meta_update_permission.unwrap_or_default(),503		};504505		// Take a (non-refundable) deposit of collection creation506		{507			let mut imbalance =508				<<<T as Config>::Currency as Currency<T::AccountId>>::PositiveImbalance>::zero();509			imbalance.subsume(510				<<T as Config>::Currency as Currency<T::AccountId>>::deposit_creating(511					&T::TreasuryAccountId::get(),512					T::CollectionCreationPrice::get(),513				),514			);515			<T as Config>::Currency::settle(516				&owner,517				imbalance,518				WithdrawReasons::TRANSFER,519				ExistenceRequirement::KeepAlive,520			)521			.map_err(|_| Error::<T>::NotSufficientFounds)?;522		}523524		<CreatedCollectionCount<T>>::put(created_count);525		<Pallet<T>>::deposit_event(Event::CollectionCreated(id, data.mode.id(), owner.clone()));526		<CollectionById<T>>::insert(id, collection);527		Ok(id)528	}529530	pub fn destroy_collection(531		collection: CollectionHandle<T>,532		sender: &T::CrossAccountId,533	) -> DispatchResult {534		ensure!(535			collection.limits.owner_can_destroy(),536			<Error<T>>::NoPermission,537		);538		collection.check_is_owner(sender)?;539540		let destroyed_collections = <DestroyedCollectionCount<T>>::get()541			.0542			.checked_add(1)543			.ok_or(ArithmeticError::Overflow)?;544545		// =========546547		<DestroyedCollectionCount<T>>::put(destroyed_collections);548		<CollectionById<T>>::remove(collection.id);549		<AdminAmount<T>>::remove(collection.id);550		<IsAdmin<T>>::remove_prefix((collection.id,), None);551		<Allowlist<T>>::remove_prefix((collection.id,), None);552553		<Pallet<T>>::deposit_event(Event::CollectionDestroyed(collection.id));554		Ok(())555	}556557	pub fn toggle_allowlist(558		collection: &CollectionHandle<T>,559		sender: &T::CrossAccountId,560		user: &T::CrossAccountId,561		allowed: bool,562	) -> DispatchResult {563		collection.check_is_owner_or_admin(sender)?;564565		// =========566567		if allowed {568			<Allowlist<T>>::insert((collection.id, user), true);569		} else {570			<Allowlist<T>>::remove((collection.id, user));571		}572573		Ok(())574	}575576	pub fn toggle_admin(577		collection: &CollectionHandle<T>,578		sender: &T::CrossAccountId,579		user: &T::CrossAccountId,580		admin: bool,581	) -> DispatchResult {582		collection.check_is_owner_or_admin(sender)?;583584		let was_admin = <IsAdmin<T>>::get((collection.id, user));585		if was_admin == admin {586			return Ok(());587		}588		let amount = <AdminAmount<T>>::get(collection.id);589590		if admin {591			let amount = amount592				.checked_add(1)593				.ok_or(<Error<T>>::CollectionAdminCountExceeded)?;594			ensure!(595				amount <= Self::collection_admins_limit(),596				<Error<T>>::CollectionAdminCountExceeded,597			);598599			// =========600601			<AdminAmount<T>>::insert(collection.id, amount);602			<IsAdmin<T>>::insert((collection.id, user), true);603		} else {604			<AdminAmount<T>>::insert(collection.id, amount.saturating_sub(1));605			<IsAdmin<T>>::remove((collection.id, user));606		}607608		Ok(())609	}610611	pub fn clamp_limits(612		mode: CollectionMode,613		old_limit: &CollectionLimits,614		mut new_limit: CollectionLimits,615	) -> Result<CollectionLimits, DispatchError> {616		macro_rules! limit_default {617				($old:ident, $new:ident, $($field:ident $(($arg:expr))? => $check:expr),* $(,)?) => {{618					$(619						if let Some($new) = $new.$field {620							let $old = $old.$field($($arg)?);621							let _ = $new;622							let _ = $old;623							$check624						} else {625							$new.$field = $old.$field626						}627					)*628				}};629			}630631		limit_default!(old_limit, new_limit,632			account_token_ownership_limit => ensure!(633				new_limit <= MAX_TOKEN_OWNERSHIP,634				<Error<T>>::CollectionLimitBoundsExceeded,635			),636			sponsor_transfer_timeout(match mode {637				CollectionMode::NFT => NFT_SPONSOR_TRANSFER_TIMEOUT,638				CollectionMode::Fungible(_) => FUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,639				CollectionMode::ReFungible => REFUNGIBLE_SPONSOR_TRANSFER_TIMEOUT,640			}) => ensure!(641				new_limit <= MAX_SPONSOR_TIMEOUT,642				<Error<T>>::CollectionLimitBoundsExceeded,643			),644			sponsored_data_size => ensure!(645				new_limit <= CUSTOM_DATA_LIMIT,646				<Error<T>>::CollectionLimitBoundsExceeded,647			),648			token_limit => ensure!(649				old_limit >= new_limit && new_limit > 0,650				<Error<T>>::CollectionTokenLimitExceeded651			),652			owner_can_transfer => ensure!(653				old_limit || !new_limit,654				<Error<T>>::OwnerPermissionsCantBeReverted,655			),656			owner_can_destroy => ensure!(657				old_limit || !new_limit,658				<Error<T>>::OwnerPermissionsCantBeReverted,659			),660			sponsored_data_rate_limit => {},661			transfers_enabled => {},662		);663		Ok(new_limit)664	}665}666667#[macro_export]668macro_rules! unsupported {669	() => {670		Err(<Error<T>>::UnsupportedOperation.into())671	};672}673674/// Worst cases675pub trait CommonWeightInfo<CrossAccountId> {676	fn create_item() -> Weight;677	fn create_multiple_items(amount: u32) -> Weight;678	fn create_multiple_items_ex(cost: &CreateItemExData<CrossAccountId>) -> Weight;679	fn burn_item() -> Weight;680	fn transfer() -> Weight;681	fn approve() -> Weight;682	fn transfer_from() -> Weight;683	fn burn_from() -> Weight;684	fn set_variable_metadata(bytes: u32) -> Weight;685}686687pub trait CommonCollectionOperations<T: Config> {688	fn create_item(689		&self,690		sender: T::CrossAccountId,691		to: T::CrossAccountId,692		data: CreateItemData,693	) -> DispatchResultWithPostInfo;694	fn create_multiple_items(695		&self,696		sender: T::CrossAccountId,697		to: T::CrossAccountId,698		data: Vec<CreateItemData>,699	) -> DispatchResultWithPostInfo;700	fn create_multiple_items_ex(701		&self,702		sender: T::CrossAccountId,703		data: CreateItemExData<T::CrossAccountId>,704	) -> DispatchResultWithPostInfo;705	fn burn_item(706		&self,707		sender: T::CrossAccountId,708		token: TokenId,709		amount: u128,710	) -> DispatchResultWithPostInfo;711712	fn transfer(713		&self,714		sender: T::CrossAccountId,715		to: T::CrossAccountId,716		token: TokenId,717		amount: u128,718	) -> DispatchResultWithPostInfo;719	fn approve(720		&self,721		sender: T::CrossAccountId,722		spender: T::CrossAccountId,723		token: TokenId,724		amount: u128,725	) -> DispatchResultWithPostInfo;726	fn transfer_from(727		&self,728		sender: T::CrossAccountId,729		from: T::CrossAccountId,730		to: T::CrossAccountId,731		token: TokenId,732		amount: u128,733	) -> DispatchResultWithPostInfo;734	fn burn_from(735		&self,736		sender: T::CrossAccountId,737		from: T::CrossAccountId,738		token: TokenId,739		amount: u128,740	) -> DispatchResultWithPostInfo;741742	fn set_variable_metadata(743		&self,744		sender: T::CrossAccountId,745		token: TokenId,746		data: BoundedVec<u8, CustomDataLimit>,747	) -> DispatchResultWithPostInfo;748749	fn account_tokens(&self, account: T::CrossAccountId) -> Vec<TokenId>;750	fn token_exists(&self, token: TokenId) -> bool;751	fn last_token_id(&self) -> TokenId;752753	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId>;754	fn const_metadata(&self, token: TokenId) -> Vec<u8>;755	fn variable_metadata(&self, token: TokenId) -> Vec<u8>;756757	/// How many tokens collection contains (Applicable to nonfungible/refungible)758	fn collection_tokens(&self) -> u32;759	/// Amount of different tokens account has (Applicable to nonfungible/refungible)760	fn account_balance(&self, account: T::CrossAccountId) -> u32;761	/// Amount of specific token account have (Applicable to fungible/refungible)762	fn balance(&self, account: T::CrossAccountId, token: TokenId) -> u128;763	fn allowance(764		&self,765		sender: T::CrossAccountId,766		spender: T::CrossAccountId,767		token: TokenId,768	) -> u128;769}770771// Flexible enough for implementing CommonCollectionOperations772pub fn with_weight(res: DispatchResult, weight: Weight) -> DispatchResultWithPostInfo {773	let post_info = PostDispatchInfo {774		actual_weight: Some(weight),775		pays_fee: Pays::Yes,776	};777	match res {778		Ok(()) => Ok(post_info),779		Err(error) => Err(DispatchErrorWithPostInfo { post_info, error }),780	}781}